XML 188 R158.htm IDEA: XBRL DOCUMENT v3.10.0.1

Pension Plans and Other Post-Retirement Benefits - Schedule of Plan Asset Allocation (Details)	Dec. 31, 2018	Dec. 31, 2017
Employee Benefits [Abstract]
Equity investments	3.00%	3.00%
Fixed income investments	76.00%	86.00%
Real estate investments	8.00%	7.00%
Qualifying insurance contract	9.00%	0.00%
Other	4.00%	4.00%
Total composition of fair value of plan assets	100.00%	100.00%

X

- Definition

Employee Benefits [Abstract]

+ References

No definition available.

+ Details

Name:	slf_EmployeeBenefitsAbstract
Namespace Prefix:	slf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Equity Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fixed Income Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_FixedIncomeInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Other Assets, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_OtherAssetsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Plan Assets At Fair Value, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_PlanAssetsAtFairValueAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Qualifying Insurance Contract, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_QualifyingInsuranceContractAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Real Estate, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

+ References

No definition available.

+ Details

Name:	slf_RealEstateAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix:	slf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant