Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized		$ 1,764	$ 1,585	$ 1,073
Income Taxes Paid, Net	[1]	(1,666)	(635)	(1,105)
Related Party Transaction, Cash Received for Income Taxes, Net		1,800	764	1,200
Capital Expenditures Incurred but Not yet Paid		$ 718	$ 1,143	$ 661

[1] Includes $1.8 billion, $764 million and $1.2 billion of income taxes received from Berkshire Hathaway in 2015, 2014 and 2013, respectively.