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Income Taxes Income Tax Disclosures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Results of Operations, Income before Income Taxes [Abstract] |  |  |
U.S. | $ 1,739 | $ 1,976 | $ 1,466
Foreign | 767 | 185 | 172
Income Before Income Taxes | 2,506 | 2,161 | 1,638
Current tax expense (benefit) [Abstract] |  |  |
Federal | (22) | (137) | (148)
State | (45) | (16) | (28)
Foreign | 249 | 18 | 6
Total | 182 | (135) | (170)
Deferred tax expense (benefit) [Abstract] |  |  |
Federal | 425 | 2,022 | 998
State | 55 | 4 | 51
Foreign | (75) | 47 | 38
Total | 405 | 2,073 | 1,087
Effective Income Tax Rate Reconciliation [Abstract] |  |  |
Federal income tax | $ 526 | $ 756 | $ 573
Federal income tax, percent | 21.00% | 35.00% | 35.00%
State deferred tax rate change | $ (7) | $ 10 | $ 11
State deferred tax rate change, percent | (0.30%) | 0.50% | 0.70%
Taxes on foreign earnings, net of federal benefit | $ 131 | $ 42 | $ 28
Taxes on foreign earnings, net of federal benefit, percent | 5.20% | 1.90% | 1.70%
Net effects of noncontrolling interests | $ (65) | $ (14) | $ (4)
Net effects of noncontrolling interests, percent | (2.60%) | (0.70%) | (0.30%)
State income tax, net of federal benefit | $ 46 | $ 38 | $ 26
State income tax, net of federal benefit, percent | 1.80% | 1.80% | 1.60%
Dividend received deduction | $ (31) | $ (56) | $ (48)
Dividend received deduction, percent | (1.20%) | (2.60%) | (2.90%)
Adjustments to uncertain tax positions | $ (47) | $ (12) | $ (23)
Adjustments to uncertain tax positions, percent | (1.90%) | (0.60%) | (1.40%)
Valuation allowance on investment and tax credits | $ 14 | $ 13 | $ 34
Valuation allowance on investment and tax credits, percent | 0.50% | 0.60% | 2.10%
Impact of the 2017 Tax Reform | $ 0 | $ 1,240 | $ 0
Impact of the 2017 Tax Reform, percent | 0.00% | 57.40% | 0.00%
Nondeductible goodwill | $ 58 | $ 0 | $ 301
Nondeductible goodwill, percent | 2.30% | 0.00% | 18.50%
General business credit | $ (64) | $ (95) | $ 0
General business credit, percent | (2.60%) | (4.40%) | (0.00%)
Other | $ 26 | $ 16 | $ 19
Other, percent | 1.20% | 0.80% | 1.10%
Total | $ 587 | $ 1,938 | $ 917
Total, percent | 23.40% | 89.70% | 56.10%
Deferred Tax Assets [Abstract] |  |  |
Employee benefits | $ 238 | $ 251 |
Accrued expenses | 76 | 73 |
Net operating loss, capital loss and tax credit carryforwards | 1,526 | 1,113 |
Derivative instruments and interest rate and currency swaps | 9 | 12 |
Debt fair value adjustments | 33 | 37 |
Investments | 177 | 968 |
Other | 0 | 6 |
Valuation allowance | (178) | (171) |
Total deferred tax assets | 1,881 | 2,289 |
Deferred Tax Liabilities, Gross [Abstract] |  |  |
Property, plant and equipment | 270 | 225 |
Other | 45 | 20 |
Total deferred tax liabilities | 315 | 245 |
Net deferred tax assets | 1,566 | 2,044 |
Canada |  |  |
Income Tax Disclosures [Line Items] |  |  |
Income Tax Expense | 168 | 58 | $ 38
Mexico |  |  |
Income Tax Disclosures [Line Items] |  |  |
Income Tax Expense | $ 6 | $ 7 | $ 6

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