SHARE CAPITAL (Tables)

12 Months Ended

Dec. 31, 2019

SHARE CAPITAL.

Schedule of share repurchase activities

($ millions except as noted)		2019	2018
Share repurchase activities (thousands of common shares)
	Shares repurchased	55 298	64 426
Amounts charged to
	Share capital	905	1 040
	Retained earnings	1 369	2 013
Share repurchase cost		2 274	3 053
Average repurchase cost per share (dollars)		41.12	47.38

Schedule of liability for share repurchases

($ millions)		December 31 2019	December 31 2018
Amounts charged to
	Share capital	65	111
	Retained earnings	103	152
Liability for share purchase commitment		168	263