Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Mortgage Servicing Rights (Details)

v3.7.0.1
Fair Value Measurements - Mortgage Servicing Rights (Details)
$ in Millions
Jun. 30, 2017
USD ($)
Fair Value Disclosures [Abstract]  
Impact of 10 percent decrease in prepayment speed $ 92
Impact of 20 percent decrease in prepayment speed 193
Impact of 10 percent increase in prepayment speed 85
Impact of 20 percent increase in prepayment speed 165
Impact of 100 basis points decrease in option adjusted spread 80
Impact of 200 basis points decrease in option adjusted spread 165
Impact of 100 basis points increase in option adjusted spread 74
Impact of 200 basis points increase in option adjusted spread $ 144