v3.3.1.900
Income Taxes Operating Loss and Tax Credit Carryforwards, United States, By Expiration Dates (Details) - Internal Revenue Service (IRS) [Member] - Domestic Tax Authority [Member]
$ in Millions
Dec. 31, 2015
USD ($)
Not subject to expiration [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards $ 0
Not subject to expiration [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 30
Not subject to expiration [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 0
Not subject to expiration [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
Not subject to expiration [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
Valuation allowance [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 0
Valuation allowance [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards (66)
Valuation allowance [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards (66)
Valuation allowance [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards (12)
Valuation allowance [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards (12)
2016 through 2020 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 0
2016 through 2020 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 28
2016 through 2020 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 28
2016 through 2020 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
2016 through 2020 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
2021 through 2025 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 0
2021 through 2025 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 69
2021 through 2025 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 69
2021 through 2025 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
2021 through 2025 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
2026 through 2030 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 35
2026 through 2030 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 27
2026 through 2030 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 25
2026 through 2030 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 12
2026 through 2030 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 12
2031 through 2035 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 415
2031 through 2035 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 108
2031 through 2035 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 40
2031 through 2035 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 107
2031 through 2035 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 8
2036 through 2040 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax loss carryforwards 0
2036 through 2040 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 21
2036 through 2040 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal income tax credit carryforwards 21
2036 through 2040 [Member] | Before ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards 0
2036 through 2040 [Member] | After ASU 2013-11 [Member]  
Operating Loss and Tax Credit Carry Forward [Line Items]  
United States federal deferred income tax assets for income tax loss carryforwards $ 0