Fair Value Measurements (Details 3-Reported) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Fair Value [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Other noncurrent financial assets		$ 198	$ 104
Total financial assets		198	104
Financial liabilities
Other current financial liabilities		25	34
Long-term debt, including current portion	[1]	7,186	6,723
Deferred credits and other financial liabilities		121	97
Financial Liabilities Fair Value Disclosure		7,332	6,854
Carrying Amount [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Other noncurrent financial assets		206	118
Total financial assets		206	118
Financial liabilities
Other current financial liabilities		24	33
Long-term debt, including current portion	[1]	7,291	7,291
Deferred credits and other financial liabilities		117	95
Financial Liabilities Fair Value Disclosure		$ 7,432	$ 7,419

[1] Excludes capital leases, debt issuance costs and interest rate swap adjustments.