Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
SUPPLEMENTAL DISCLOSURES:
Cash payments for interest, net of capitalized interest	$ 2,310	$ 2,250
Cash payments for income taxes, net of refunds	$ 257	266
Non-cash activities:
Impact of adoption of accounting standard ASU No. 2015-02		200
Sold assets previously classified as held for sale exchanged for financial instruments		1,810
Sold liabilities previously classified as held for sale exchanged for financial instruments		697
Financial instruments received in exchange for sold assets and liabilities previously classified as held for sale		1,110
APEX exchanged, fair value		505
Series E and Series F Preferred Stock cancelled, net carrying value		$ 666