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Quarterly Operating Results (unaudited) (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring and integration charges | $ 42 | $ 23 | $ 23 | $ 18 | $ 24 | $ 18 | $ 19 | $ 21 |  |  |
Share-based compensation, excess tax benefit, amount | 1 | 7 | 13 | 16 | 2 | 3 | 2 | 2 | $ 37 | $ 9 |
Pre-tax gain (loss) recognized |  |  |  |  |  |  |  |  | 0 | 118 | $ 334
Focus Diagnostics Products [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain (loss) recognized |  |  |  |  |  |  | 118 |  |  | 118 |
Domestic Country [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax Cuts and Jobs Act of 2017, income tax expense (benefit) | (106) |  |  |  |  |  |  |  | (106) |  |
Tax Cuts and Jobs Act of 2017, deferred tax expense (benefit) | (115) |  |  |  |  |  |  |  | (115) |  |
Tax Cuts and Jobs Act of 2017, current income tax expense (benefit) | 9 |  |  |  |  |  |  |  | $ 9 |  |
Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain related to sale |  |  | 7 |  |  |  |  |  |  |  |
Losses on extinguishment of debt |  |  |  |  |  |  |  |  |  | $ 48 | $ 144
Other Operating (Income) Expense [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain on escrow recovery |  |  |  |  |  | 21 |  |  |  |  |
Income (Loss) from Equity Method Investments [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring and integration charges |  |  | 1 |  | 1 |  | 1 | 2 |  |  |
Non-cash asset impairment charges and costs incurred as a result of hurricanes [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges and costs incurred as a result of hurricanes | 6 | 9 |  |  |  |  |  |  |  |  |
Non-cash asset impairment charges and costs incurred as a result of hurricanes [Member] | Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges and costs incurred as a result of hurricanes |  | 5 |  |  |  |  |  |  |  |  |
Non-cash asset impairment charges and costs incurred as a result of hurricanes [Member] | Cost of Sales [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges and costs incurred as a result of hurricanes | 2 | 3 |  |  |  |  |  |  |  |  |
Non-cash asset impairment charges and costs incurred as a result of hurricanes [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges and costs incurred as a result of hurricanes | 4 | 1 |  |  |  |  |  |  |  |  |
Retirement of Debt [Member] | Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Losses on extinguishment of debt |  |  |  |  |  |  |  | 48 |  |  |
Cost of Sales [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring and integration charges | 14 | 12 | 9 | 10 | 15 | 8 | 10 | 7 |  |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring and integration charges | $ 28 | $ 11 | 13 | $ 8 | 7 | $ 10 | 8 | 12 |  |  |
Selling, General and Administrative Expenses [Member] | Legal Matters [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Legal costs |  |  | $ 2 |  |  |  | 1 | 2 |  |  |
Other Operating (Income) Expense [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring and integration charges |  |  |  |  | 1 |  |  |  |  |  |
Impairment charges |  |  |  |  | $ 6 |  |  | 1 |  |  |
Non-cash Asset Impairment Charges [Member] | Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Non-cash asset impairment charges |  |  |  |  |  |  | $ 6 | $ 1 |  |  |

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