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Income Taxes - Income from continuing operations before income tax (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income (loss) before income taxes: |  |  |
Income before income taxes | $ 2,465 | $ 1,871 | $ 1,246
Current: |  |  |
Total current tax expense | 439 | 333 | 371
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | 9 | (36) | (225)
Total income tax expense | 448 | 297 | 146
Ireland |  |  |
Income (loss) before income taxes: |  |  |
Income before income taxes | (86) | 200 | 208
Current: |  |  |
Total current tax expense | 2 | 1 | 2
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | (1) | (1) | (1)
U.K. |  |  |
Income (loss) before income taxes: |  |  |
Income before income taxes | 634 | 228 | (240)
Current: |  |  |
Total current tax expense | 30 | 20 | 21
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | 39 | 35 | 19
U.S. federal |  |  |
Income (loss) before income taxes: |  |  |
Income before income taxes | (29) | (219) | (601)
Current: |  |  |
Total current tax expense | 126 | 22 | 101
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | (72) | (20) | (165)
U.S. state and local |  |  |
Current: |  |  |
Total current tax expense | 22 | 41 | 35
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | (4) | (27) | (56)
Other |  |  |
Income (loss) before income taxes: |  |  |
Income before income taxes | 1,946 | 1,662 | 1,879
Current: |  |  |
Total current tax expense | 259 | 249 | 212
Deferred tax expense (benefit): |  |  |
Total deferred tax expense (benefit) | $ 47 | $ (23) | $ (22)

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