SUBSEQUENT EVENTS (Tables)

12 Months Ended

Dec. 31, 2017

Subsequent Events [Abstract]

Pro Forma Earnings Per Diluted Share

	Years ended December 31,
Unaudited pro forma	2017		2016		2015
Diluted earnings per common share attributable to Aflac Incorporated shareholders, adjusted for the two-for-one stock split	$	5.77	$	3.21	$	2.93