Fair Value Measurements Fair Value Tables (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Predecessor [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	[1]		$ 182
Derivative Liability	[1]		121
Predecessor [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value			8,460
Predecessor [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	[2]		2,713
Marketable Securities			1,362
Assets at Fair Value			4,257
Long-term Debt, Fair Value	[3]		8,464
Liabilities at Fair Value			8,585
Predecessor [Member] | Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	[4]		182
Derivative Liability	[4]		$ 121
Successor [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		$ 46
Derivative Liability		79
Successor [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value		10,250
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	[5]	5,205
Marketable Securities		952
Assets at Fair Value		6,203
Long-term Debt, Fair Value	[6]	11,560
Liabilities at Fair Value		11,639
Successor [Member] | Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	[7]	46
Derivative Liability	[7]	$ 79

[1] The company's derivative assets and liabilities subject to enforceable master netting arrangements totaled $114 million at December 31, 2016.

[2] Time deposits included in "Cash and cash equivalents" and money market funds included in "Other current assets" in the consolidated balance sheets are held at amortized cost, which approximates fair value.

[3] See Note 13 for information on fair value measurements of long-term debt.

[4] See Note 18 for the classification of derivatives in the consolidated balance sheets.

[5] Time deposits included in "Cash and cash equivalents" and money market funds included in "Other current assets" in the consolidated balance sheets are held at amortized cost, which approximates fair value.

[6] See Note 13 for information on fair value measurements of long-term debt.

[7] See Note 18 for the classification of derivatives in the consolidated balance sheets.