CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Mandatory convertible preference shares, series A:	Common shares:	Other capital:	Retained earnings:	Cumulative other comprehensive loss:	Total equity:	Plum Creek Common shares:	Plum Creek Other capital:
Balance at beginning of year at Dec. 31, 2014		$ 14	$ 656	$ 4,519	$ 1,508	$ (1,393)
Conversion to common shares (Note 15)		0
Preference shares converted to common shares (Note 15)			0
Issued for exercise of stock options			2	32
Repurchase of common shares (Note 15)			(20)	(498)
Release of vested restricted stock units			0
Share-based compensation				32
Plum Creek acquisition								$ 0	$ 0
Other transactions, net				(5)
Net earnings	$ 506				506
Dividends on common shares					(621)
Adjustments related to new accounting pronouncements (Note 1)					0
Cash dividends on preference shares					(44)
Foreign currency translation adjustments	(97)					(97)
Changes in unamortized net pension and other postretirement benefit gain (loss) (Note 9)	282					282
Changes in unamortized prior service credit (cost) (Note 9)	(4)					(4)
Unrealized gains on available-for-sale securities						0
Balance at end of year at Dec. 31, 2015		14	638	4,080	1,349	(1,212)	$ 4,869
Conversion to common shares (Note 15)		14
Preference shares converted to common shares (Note 15)			29
Issued for exercise of stock options			3	61
Repurchase of common shares (Note 15)			(85)	(1,918)
Release of vested restricted stock units			2
Share-based compensation				35
Plum Creek acquisition								349	6,046
Other transactions, net				(22)
Net earnings	1,027				1,027
Dividends on common shares					(933)
Adjustments related to new accounting pronouncements (Note 1)					0
Cash dividends on preference shares					(22)
Foreign currency translation adjustments	25					25
Changes in unamortized net pension and other postretirement benefit gain (loss) (Note 9)	(269)					(269)
Changes in unamortized prior service credit (cost) (Note 9)	(4)					(4)
Unrealized gains on available-for-sale securities						1
Balance at end of year at Dec. 31, 2016	9,180	0	936	8,282	1,421	(1,459)	9,180
Conversion to common shares (Note 15)		0
Preference shares converted to common shares (Note 15)			0
Issued for exercise of stock options			7	128
Repurchase of common shares (Note 15)			0	0
Release of vested restricted stock units			1
Share-based compensation				35
Plum Creek acquisition								$ 0	$ 0
Other transactions, net				(6)
Net earnings	582				582
Dividends on common shares					(944)
Adjustments related to new accounting pronouncements (Note 1)					19
Cash dividends on preference shares					0
Foreign currency translation adjustments	32					32
Changes in unamortized net pension and other postretirement benefit gain (loss) (Note 9)	(132)					(132)
Changes in unamortized prior service credit (cost) (Note 9)	(5)					(5)
Unrealized gains on available-for-sale securities						2
Balance at end of year at Dec. 31, 2017	$ 8,899	$ 0	$ 944	$ 8,439	$ 1,078	$ (1,562)	$ 8,899