Condensed Consolidated Statement of Changes in Equity Statement - USD ($) shares in Thousands, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Deferred Compensation, Share-based Payments [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	ASU 2014-09 [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 31,421
Stockholders' Equity Attributable to Parent		$ 17,574	$ (35,596)	$ 55,242	$ (85)	$ (7,525)
Stockholders' Equity Attributable to Noncontrolling Interest							$ 1,811
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures		68	2		1
Treasury Stock, Value, Acquired, Cost Method			25
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests		1					1
Noncontrolling Interest, Change in Redemption Value		0		(2)
Net income attributable to common shareowners	$ 1,297			1,297
Dividends, Common Stock				535
Employee Stock Ownership Plan (ESOP), Dividends Paid to ESOP				18
Stockholders' Equity, Other				29			0	$ (480)
Reclassification to Retained Earnings, current period, ASU 2018-02 adoption impact				0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent						588
Net Income (Loss) Attributable to Noncontrolling Interest							71
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest							(2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							33
Reclassification from OCI, current period, ASU 2018-02 adoption impact						0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders							66
Non-controlling interest, decrease from disposition of non-controlling interest							8
Noncontrolling Interest, Increase from Capital Contributions							120
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	1,075
Stock Repurchased During Period, Shares	188
Common Stock, Dividends, Per Share, Declared	$ 0.700
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 32,492
Stockholders' Equity Attributable to Parent		17,641	(35,619)	55,533	(84)	(6,937)
Stockholders' Equity Attributable to Noncontrolling Interest							1,958
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	40,610
Stockholders' Equity Attributable to Parent	38,446	22,514	(32,482)	57,823	(76)	(9,333)
Stockholders' Equity Attributable to Noncontrolling Interest	2,164						2,164
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures		57	3		1
Treasury Stock, Value, Acquired, Cost Method			32
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests		0					0
Noncontrolling Interest, Change in Redemption Value		(7)		4
Net income attributable to common shareowners	1,346			1,346
Dividends, Common Stock				609
Employee Stock Ownership Plan (ESOP), Dividends Paid to ESOP				18
Stockholders' Equity, Other				(12)			3	$ 0
Reclassification to Retained Earnings, current period, ASU 2018-02 adoption impact				745
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent						559
Net Income (Loss) Attributable to Noncontrolling Interest							79
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest							3
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							3
Reclassification from OCI, current period, ASU 2018-02 adoption impact	$ (745)					(745)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders							44
Non-controlling interest, decrease from disposition of non-controlling interest							0
Noncontrolling Interest, Increase from Capital Contributions							0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	1,028
Stock Repurchased During Period, Shares	256
Common Stock, Dividends, Per Share, Declared	$ 0.735
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 41,946
Stockholders' Equity Attributable to Parent	39,738	$ 22,564	$ (32,511)	$ 59,279	$ (75)	$ (9,519)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 2,208						$ 2,208