Derivative and Other Financial Instruments (Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivative assets
Total	$ 83	$ 47
Derivative liabilities
Total	49	59
Level 2
Derivative assets
Total	83	47
Derivative liabilities
Total	49	59
Derivatives designated as hedges: | Other assets | Level 2
Derivative assets
Derivatives designated as hedging instruments	74	43
Derivatives designated as hedges: | Other non-current liabilities | Net investment hedge | Level 2
Derivative assets
Derivatives designated as hedging instruments	2	0
Derivatives designated as hedges: | Other liabilities | Level 2
Derivative assets
Derivatives designated as hedging instruments	43	55
Derivatives not designated as hedges: | Other current assets | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives not designated as hedging instruments	7	4
Derivatives not designated as hedges: | Other non-current assets | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives not designated as hedging instruments	2	0
Derivatives not designated as hedges: | Other assets | Level 2
Derivative assets
Derivatives not designated as hedging instruments	9	4
Derivatives not designated as hedges: | Accrued liabilities | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives not designated as hedging instruments	5	4
Derivatives not designated as hedges: | Other non-current liabilities | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives not designated as hedging instruments	1	0
Derivatives not designated as hedges: | Other liabilities | Level 2
Derivative assets
Derivatives not designated as hedging instruments	6	4
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other current assets | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	10	6
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other current assets | Commodities contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	11	16
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other non-current assets | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	1	3
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other non-current assets | Commodities contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	0	2
Derivatives in cash flow hedges | Derivatives designated as hedges: | Accrued liabilities | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	15	5
Derivatives in cash flow hedges | Derivatives designated as hedges: | Accrued liabilities | Commodities contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	21	42
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other non-current liabilities | Foreign exchange contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	1	1
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other non-current liabilities | Commodities contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	0	6
Derivatives in cash flow hedges | Derivatives designated as hedges: | Other non-current liabilities | Interest rate contracts cash flow | Level 2
Derivative assets
Derivatives designated as hedging instruments	1
Derivatives in fair value hedges | Derivatives designated as hedges: | Other current assets | Foreign exchange contracts fair value | Level 2
Derivative assets
Derivatives designated as hedging instruments	1	1
Derivatives in fair value hedges | Derivatives designated as hedges: | Accrued liabilities | Foreign exchange contracts fair value | Level 2
Derivative assets
Derivatives designated as hedging instruments	3	1
Net investment hedge | Derivatives designated as hedges: | Other non-current assets | Level 2
Derivative assets
Derivatives designated as hedging instruments	$ 51	$ 15