Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized		$ 1,673	$ 1,764	$ 1,585
Income Taxes Paid, Net	[1]	(1,016)	(1,666)	(635)
Related Party Transaction, Cash Received for Income Taxes, Net		1,100	1,800	764
Capital Expenditures Incurred but Not yet Paid		$ 547	$ 718	$ 1,143

[1] Includes $1.1 billion, $1.8 billion and $764 million of income taxes received from Berkshire Hathaway in 2016, 2015 and 2014, respectively.