XML 50 R63.htm IDEA: XBRL DOCUMENT v3.19.3
Amortized Cost and Fair Value of Investments in Debt Securities by Estimated Average Life (Detail)
$ in Millions
Sep. 30, 2019
USD ($)
Distribution of Maturities: Amortized Cost, 1 Year or Less $ 2,117
Distribution of Maturities: Amortized Cost, 1-5 Years 12,679
Distribution of Maturities: Amortized Cost, 5-10 Years 14,844
Distribution of Maturities: Amortized Cost, After 10 Years 932
Distribution of Maturities: Amortized Cost, Total 30,572
Distribution of Maturities: Fair Value, 1 Year or Less 2,169
Distribution of Maturities: Fair Value, 1-5 Years 12,999
Distribution of Maturities: Fair Value, 5-10 Years 15,233
Distribution of Maturities: Fair Value, After 10 Years 957
Distribution of Maturities: Fair Value, Total $ 31,358
Available For Sale Securities Debt Maturities, Yield, One Year Or Less 3.09% [1]
Available For Sale Securities Debt Maturities, Yield, After One Through Five Years 2.81% [1]
Available For Sale Securities Debt Maturities, Yield, After Five Through Ten Years 2.93% [1]
Available For Sale Securities Debt Maturities, Yield, After Ten Years 3.02% [1]
Available For Sale Securities Debt Maturities, Yield 2.89% [1]
US Treasury Securities [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less $ 632
Distribution of Maturities: Amortized Cost, 1-5 Years 2,331
Distribution of Maturities: Amortized Cost, 5-10 Years 952
Distribution of Maturities: Amortized Cost, After 10 Years 0
Distribution of Maturities: Amortized Cost, Total 3,915
Distribution of Maturities: Fair Value, 1 Year or Less 634
Distribution of Maturities: Fair Value, 1-5 Years 2,389
Distribution of Maturities: Fair Value, 5-10 Years 995
Distribution of Maturities: Fair Value, After 10 Years 0
Distribution of Maturities: Fair Value, Total 4,018
US Government Agencies Debt Securities [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 50
Distribution of Maturities: Amortized Cost, 1-5 Years 10
Distribution of Maturities: Amortized Cost, 5-10 Years 6
Distribution of Maturities: Amortized Cost, After 10 Years 57
Distribution of Maturities: Amortized Cost, Total 123
Distribution of Maturities: Fair Value, 1 Year or Less 50
Distribution of Maturities: Fair Value, 1-5 Years 10
Distribution of Maturities: Fair Value, 5-10 Years 6
Distribution of Maturities: Fair Value, After 10 Years 58
Distribution of Maturities: Fair Value, Total 124
US States and Political Subdivisions Debt Securities [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 0
Distribution of Maturities: Amortized Cost, 1-5 Years 90
Distribution of Maturities: Amortized Cost, 5-10 Years 317
Distribution of Maturities: Amortized Cost, After 10 Years 157
Distribution of Maturities: Amortized Cost, Total 564
Distribution of Maturities: Fair Value, 1 Year or Less 0
Distribution of Maturities: Fair Value, 1-5 Years 95
Distribution of Maturities: Fair Value, 5-10 Years 320
Distribution of Maturities: Fair Value, After 10 Years 157
Distribution of Maturities: Fair Value, Total 572
Other Debt Obligations [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 0
Distribution of Maturities: Amortized Cost, 1-5 Years 12
Distribution of Maturities: Amortized Cost, 5-10 Years 0
Distribution of Maturities: Amortized Cost, After 10 Years 0
Distribution of Maturities: Amortized Cost, Total 12
Distribution of Maturities: Fair Value, 1 Year or Less 0
Distribution of Maturities: Fair Value, 1-5 Years 12
Distribution of Maturities: Fair Value, 5-10 Years 0
Distribution of Maturities: Fair Value, After 10 Years 0
Distribution of Maturities: Fair Value, Total 12
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 1,435
Distribution of Maturities: Amortized Cost, 1-5 Years 9,389
Distribution of Maturities: Amortized Cost, 5-10 Years 10,890
Distribution of Maturities: Amortized Cost, After 10 Years 355
Distribution of Maturities: Amortized Cost, Total 22,069
Distribution of Maturities: Fair Value, 1 Year or Less 1,485
Distribution of Maturities: Fair Value, 1-5 Years 9,630
Distribution of Maturities: Fair Value, 5-10 Years 11,108
Distribution of Maturities: Fair Value, After 10 Years 362
Distribution of Maturities: Fair Value, Total 22,585
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 0
Distribution of Maturities: Amortized Cost, 1-5 Years 835
Distribution of Maturities: Amortized Cost, 5-10 Years 1,683
Distribution of Maturities: Amortized Cost, After 10 Years 363
Distribution of Maturities: Amortized Cost, Total 2,881
Distribution of Maturities: Fair Value, 1 Year or Less 0
Distribution of Maturities: Fair Value, 1-5 Years 851
Distribution of Maturities: Fair Value, 5-10 Years 1,752
Distribution of Maturities: Fair Value, After 10 Years 380
Distribution of Maturities: Fair Value, Total 2,983
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]  
Distribution of Maturities: Amortized Cost, 1 Year or Less 0
Distribution of Maturities: Amortized Cost, 1-5 Years 12
Distribution of Maturities: Amortized Cost, 5-10 Years 996
Distribution of Maturities: Amortized Cost, After 10 Years 0
Distribution of Maturities: Amortized Cost, Total 1,008
Distribution of Maturities: Fair Value, 1 Year or Less 0
Distribution of Maturities: Fair Value, 1-5 Years 12
Distribution of Maturities: Fair Value, 5-10 Years 1,052
Distribution of Maturities: Fair Value, After 10 Years 0
Distribution of Maturities: Fair Value, Total $ 1,064
[1] Weighted average yields are based on amortized cost and presented on an FTE basis.