revenue from contracts with customers (Tables)

12 Months Ended

Dec. 31, 2019

revenue from contracts with customers


As at December 31 (millions)	2019		2018
Estimated minimum transaction price allocated to remaining unfulfilled, or partially unfulfilled, performance obligations to be recognized as revenue in a future period 1, 2
During the 12-month period ending one year hence	$	2,405	$	2,306
During the 12-month period ending two years hence		930		933
Thereafter		40		24
	$	3,375	$	3,263

(1)

Excludes constrained variable consideration amounts, amounts arising from contracts originally expected to have a duration of one year or less and, as a permitted practical expedient, amounts arising from contracts that are not affected by revenue recognition timing differences arising from transaction price allocation or from contracts under which we may recognize and bill revenue in an amount that corresponds directly with our completed performance obligations.

(2)

IFRS-IASB requires the explanation of when we expect to recognize as revenue the amounts disclosed as the estimated minimum transaction price allocated to remaining unfulfilled, or partially unfulfilled, performance obligations. The estimated amounts disclosed are based upon contractual terms and maturities. Actual minimum transaction price revenues recognized, and the timing thereof, will differ from these estimates primarily due to the frequency with which the actual durations of contracts with customers do not match their contractual maturities.

Schedule of accounts receivable


As at December 31 (millions)	Note	2019		2018
Customer accounts receivable		$	1,570	$	1,263
Accrued receivables – customer			180		175
Allowance for doubtful accounts	4(b)		(46)		(53)
			1,704		1,385
Accrued receivables – other			258		215
		$	1,962	$	1,600

Schedule of contract assets


Years ended December 31 (millions)	Note	2019		2018
Balance, beginning of period		$	1,475	$	1,303
Net additions arising from operations			1,161		1,455
Amounts billed in period and thus reclassified to accounts receivable 1			(1,416)		(1,284)
Change in impairment allowance, net	4(b)		17		(1)
Other			1		2
Balance, end of period		$	1,238	$	1,475
To be billed and thus reclassified to accounts receivable during:
The 12-month period ending one year hence		$	910	$	1,017
The 12-month period ending two years hence			308		444
Thereafter			20		14
Balance, end of period		$	1,238	$	1,475
Reconciliation of contract assets presented in the Consolidated statements of financial position – current
Gross contract assets		$	910	$	1,017
Reclassification to contract liabilities of contracts with contract assets less than contract liabilities	24		(7)		(3)
Reclassification from contract liabilities of contracts with contract liabilities less than contract assets	24		(166)		(154)
		$	737	$	860

(1)

For the year ended December 31, 2019, amounts billed for our wireless segment and reclassified to accounts receivable totalled $1,288 (2018 – $1,180).